/*
 * Copyright (C) 2011 Google Inc.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */

package org.ros.node;

/**
 * A listener for lifecycle events on a {@link Node}.
 *
 * @author Keith M. Hughes
 */
public interface NodeListener {

  /**
   * Called when the {@link Node} has been started.
   * 
   * @param node
   *          the {@link Node} that has been started
   */
  void onStart(Node node);
  
  /**
   * Called when the {@link Node} has been shut down.
   * 
   * @param node
   *          the {@link Node} that has been shut down
   */
  void onShutdown(Node node);
}
